The term 'SORT OF ENGINE' can be solved by the crossword solution 'TURBO'. A turbocharger is a type of forced induction system that increases the power output of an engine by forcing extra air into the combustion chamber. This is done by using a turbine-driven compressor to increase the pressure and density of the air entering the engine, resulting in more power. Turbochargers are commonly used on diesel and gasoline engines, and are becoming increasingly popular in hybrid and electric vehicles.